*{
    margin: 0;
    padding: 0;
}
a{
    text-decoration: none;
}

a:link {
    text-decoration: none;
    color: #000;
}

/* 状态二: 已经访问过的链接 */
a:visited {
    text-decoration: none;
    color: #000;
}

/* 状态三: 鼠标划过(停留)的链接(默认红色) */
a:hover {
    text-decoration: none;
    color: #000;
}
/* 状态四: 被点击的链接 */
a:active {
    text-decoration: none;
    color: #000;
}

input::-webkit-input-placeholder { /* WebKit browsers */
    color: rgba(255,255,255,.7);
    }
